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UDF for Evaporation

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Old   August 25, 2010, 02:54
Question UDF for Evaporation
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Rana
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i need to write a udf for evaporation occurring by means of decreasing pressure which in turn decreases the temperature.

can anyone help me...

thanks
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Old   August 25, 2010, 13:59
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Allan Walsh
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Are you modeling evaporation from discrete particles? Or from a pool of liquid? There are some examples of doing the former in the UDF manual.
What is your time schedule? Based on experience from modeling evaporation from particles, you would want to schedule several weeks for a task such as this. Good luck.
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Old   August 26, 2010, 00:05
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Dear Allan

I have to do it for refrigerant flow in a capillary tube. I planned to spend a week for this.

Any idea or tutorials is available for this type of simulation in fluent?
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Old   August 26, 2010, 13:36
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I would start with the tutorials for two-phase flow which allow for boiling/evaporation. There is at least one for water.
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decraing presssure, evaporation, saturation temeprature

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